Electrical drive device for a ship with elastically supported electric motor

Abstract

The device ( 100 ) is provided with an electric motor, located on the underside of a ship hull in a housing ( 12 ) arranged like a gondola. At least one propeller ( 2, 3 ) is coupled to the drive shaft ( 1 ), supporting the rotor ( 4 ) of the electric motor. In order that such a drive device may be resistant to shock loads, the stator ( 5 ) of the electric motor is fixed to the rotor ( 4 ) by means of a pivot bearing ( 9 ) and the module comprising rotor ( 4 ) and strator ( 5 ) is elastically supported both on the housing ( 12 ) and also the drive shaft ( 1 ).

1 . An electrical propulsion device for a vessel, comprising: 
 a housing, arranged on a lower surface of a hull of the vessel;    an electric motor, arranged in the housing and including a strator and a rotor; and    at least one propeller coupled to a propulsion shaft to which the rotor is fitted, wherein the strator is fixed on the rotor via rotating bearings, and wherein a unit formed from the stator and rotor is elastically supported on the housing and the propulsion shaft.    
     
     
         2 . The propulsion device as claimed in  claim 1 , wherein the rotor includes a tube-shaped mounting body and an active part fitted to the mounting body and an elastically supported on the propulsion shaft, and wherein the stator is mounted on the mounting body of the rotor and is elastically supported on the housing.  
     
     
         3 . The propulsion device as claimed in  claim 1 , wherein the support for the rotor on the propulsion shaft is designed to be soft in the axial and radial directions and torsionally stiff in the circumferential direction.  
     
     
         4 . The propulsion device as claimed in  claim 1 , wherein the rotating bearing is in the form of a roller bearing.  
     
     
         5 . The propulsion device as claimed in  claim 1 , wherein the bearings for bearing the propulsion shaft are in the form of sliding bearings.  
     
     
         6 . The propulsion device as claimed in  claim 2 , wherein the rotating bearing is in the form of a roller bearing.  
     
     
         7 . The propulsion device as claimed in  claim 3 , wherein the rotating bearing is in the form of a roller bearing.  
     
     
         8 . The propulsion device as claimed in  claim 2 , wherein the bearings for bearing the propulsion shaft are in the form of sliding bearings.  
     
     
         9 . The propulsion device as claimed in  claim 3 , wherein the bearings for bearing the propulsion shaft are in the form of sliding bearings.  
     
     
         10 . The propulsion device as claimed in  claim 4 , wherein the bearings for bearing the propulsion shaft are in the form of sliding bearings.  
     
     
         11 . The propulsion device as claimed in  claim 6 , wherein the bearings for bearing the propulsion shaft are in the form of sliding bearings.  
     
     
         12 . The propulsion device as claimed in  claim 7 , wherein the bearings for bearing the propulsion shaft are in the form of sliding bearings.  
     
     
         13 . An electrical propulsion device for a vessel, comprising: 
 a housing, including a stator and a rotor forming a unit; and    a propulsion shaft, to which at least one propeller is coupled, wherein the stator is coupled to the rotor via at least one rotateable bearing and wherein the unit is elastically supported on the housing and the propulsion shaft.    
     
     
         14 . The propulsion device as claimed in  claim 13 , wherein the rotor includes a tube-shaped mounting body and an active part fitted to the mounting body and is elastically supported on the propulsion shaft, and wherein the stator is mounted on the mounting body of the rotor and is elastically supported on the housing.  
     
     
         15 . The propulsion device as claimed in  claim 13 , wherein a support for the rotor on the propulsion shaft is designed to be soft in the axial and radial directions and torsionally stiff in the circumferential direction.  
     
     
         16 . The propulsion device as claimed in  claim 13 , wherein the rotatable bearing is in the form of a roller bearing.  
     
     
         17 . The propulsion device as claimed in  claim 13 , wherein the bearings are in the form of sliding bearings.